Spring manufacturing machine

Abstract

To efficiently manufacture springs having various kinds of shapes, a spring manufacturing machine is structured such as to bend a wire by two inner engagement projections ( 47 ) by adjusting a position of a position adjusting table ( 34 ), fitting a gap ( 46 ) to the wire fed out from a final wire guide ( 13 ) and temporarily stopping, and thereafter rotating a rotation spindle ( 48 ), and also to bend a wire on the basis of a cooperation of an outer engagement projection ( 44 ) and the inner engagement projection ( 47 ) by adjusting the position of the position adjusting table ( 34 ), fitting the gap ( 46 ) to the wire fed out from the final wire guide ( 13 ) and temporarily stopping, and thereafter rotating a rotation sleeve ( 45 ).

1. A spring manufacturing machine ( 1 ) comprising:
 a wire working space ( 15 ) provided in front of a front wall ( 4 ) in a machine casing ( 2 ); 
 a final wire guide ( 13 ) guiding a wire fed out toward the wire working space ( 15 ) and provided in the front wall ( 4 ) so as to direct a wire passage to the back and forth direction; 
 a wire feeding unit ( 16 ) provided in the rear of the front wall ( 4 ); 
 a pair of right and left position adjusting tables ( 34 ) movably provided in the front face of the front wall ( 4 ); and 
 wire working apparatuses ( 41 ) provided in these position adjusting tables ( 34 ), 
 wherein said wire feeding unit ( 16 ) has a casing ( 17 ) having a wire penetrating opening passing through in the back and forth direction, and at least a pair of wire feeding rollers ( 24 ) rotatably provided in the casing ( 17 ) and feeding the wire toward the final wire guide ( 13 ) while clamping the wire, 
 said right position adjusting table ( 34 ) has a first moving table ( 36 ) provided in the front wall ( 4 ) so as to freely move in the direction orthogonal to a right incline virtual line (L 2 ), the right incline virtual line being at an angle of 45 degrees as seen from the front with a vertical virtual line (L 1 ), and passing through the center line (C 1 ) of the wire passage in the final wire guide ( 13 ), the right incline virtual line (L 2 ) being perpendicular to the center line (C 1 ) of the wire passage in the final wire guide ( 13 ), and a second moving table ( 37 ) provided in the first moving table so as to freely move in the direction orthogonal to the moving direction of the first moving table ( 36 ), 
 said left position adjusting table ( 34 ) has a first moving table ( 36 ) provided in the front wall ( 4 ) so as to freely move in the direction orthogonal to a left incline virtual line (L 2 ), the left incline virtual line being at an angle of 45 degrees as seen from the front with a vertical virtual line (L 1 ), and passing through the center line (C 1 ) of the wire passage in the final wire guide ( 13 ), the left incline virtual line (L 2 ) being perpendicular to the center line (C 1 ) of the wire passage in the final wire guide ( 13 ), and a second moving table ( 37 ) provided in the first moving table so as to freely move in the direction orthogonal to the moving direction of the first moving table ( 36 ), 
 said wire working apparatus ( 41 ) has a tubular support body ( 42 ) provided in said second moving table ( 37 ) so that an axis (C 2 ) is in parallel to the moving direction of the second moving table ( 37 ), a rotation sleeve ( 45 ) fitted to the tubular support body ( 42 ) so as to freely rotate forward and backward and having an outer engagement projection ( 44 ) engaged with the wire in an end portion in the side of the wire working space ( 15 ), a rotation spindle ( 48 ) fitted to the rotation sleeve ( 45 ) so as to freely rotate forward and backward, and having at least a pair of inner engagement projections ( 47 ) opposing to each other with a gap ( 46 ) to which the wire is fitted in an end portion in the side of the wire working space ( 15 ), and a bending die ( 49 ) mounted to an end portion of the tubular support body ( 42 ) in the side of the wire working space ( 15 ), and having an incline groove ( 50 ) to which the wire is fitted, 
 said bending die ( 49 ) is positioned toward the front wall ( 4 ) from the rotation sleeve ( 45 ), 
 a leading end ( 49   a ) of said bending die ( 49 ) is disposed at a position further retreated from the wire working space ( 15 ) than the gap ( 46 ), 
 the incline groove ( 50 ) of the bending die ( 49 ) is an incline groove directed to the front wall ( 4 ) and the wire working space ( 15 ), 
 the incline groove ( 50 ) is formed parallel to the incline virtual line (L 2 ) in a state of being seen from the front, and 
 a gap ( 54 ) to which the wire is fitted is formed between the outer engagement projection ( 44 ) and the inner engagement projection ( 47 ). 
 
   
   
     2. A spring manufacturing machine as claimed in  claim 1 , wherein said final wire guide ( 13 ) is structured such as to be rotatable around the center line (C 1 ) of the wire passage, and the casing ( 17 ) of the wire feeding unit ( 16 ) is structured such as to be rotatable around the center line (C 1 ) of the wire passage. 
   
   
     3. A spring manufacturing machine ( 1 ) comprising:
 a wire working space ( 15 ) provided in front of a front wall ( 4 ) in a machine casing ( 2 ); 
 a final wire guide ( 13 ) guiding a wire fed out toward the wire working space ( 15 ) and provided in the front wall ( 4 ) so as to direct a wire passage to the back and forth direction; 
 a wire feeding unit ( 16 ) provided in the rear of the front wall ( 4 ); 
 at least one position adjusting table ( 34 ) movably provided in the front face of the front wall ( 4 ); and 
 at least one wire working apparatus ( 41 ) provided in the position adjusting table ( 34 ); 
 a bending die ( 49 ) having an incline groove ( 50 ) to which the wire fitted; 
 wherein said wire feeding unit ( 16 ) has a casing ( 17 ) having a wire penetrating opening passing through in the back and forth direction, and at least a pair of wire feeding rollers ( 24 ) rotatably provided in the casing ( 17 ) and feeding the wire toward the final wire guide ( 13 ) while clamping the wire; 
 said at least one position adjusting table ( 34 ) has a first moving table ( 36 ) provided in the front wall ( 4 ) so as to freely move in the direction orthogonal to a virtual line (L 2 ) which is perpendicular to the center line (C 1 ) of the wire passage in the final wire guide ( 13 ), and a second moving table ( 37 ) provided in the first moving table so as to freely move in the direction orthogonal to the moving direction of the first moving table ( 36 ), 
 said wire working apparatus ( 41 ) has a tubular support body ( 42 ) provided in said second moving table ( 37 ) so that an axis (C 2 ) is in parallel to the moving direction of the second moving table ( 37 ), a rotation sleeve ( 45 ) fitted to the tubular support body ( 42 ) so as to freely rotate forward and backward and having an outer engagement projection ( 44 ) engaged with the wire in an end portion in the side of the wire working space ( 15 ), a rotation spindle ( 48 ) fitted to the rotation sleeve ( 45 ) so as to freely rotate forward and backward, and having at least a pair of inner engagement projections ( 47 ) opposing to each other with a gap ( 46 ) to which the wire is fitted in an end portion in the side of the wire working space ( 15 ), 
 said bending die ( 49 ) being mounted to an end portion of the tubular support body ( 42 ) in the side of the wire working space ( 15 ), 
 said bending die ( 49 ) being positioned toward the front wall ( 4 ) from the rotation sleeve ( 45 ), 
 a leading end ( 49   a ) of said bending die ( 49 ) being disposed at a position further retreated from the wire working space ( 15 ) than the gap ( 46 ), 
 the incline groove ( 50 ) of the bending die ( 49 ) being an incline groove directed to the front wall ( 4 ) and the wire working space ( 15 ), 
 the incline groove ( 50 ) being formed parallel to the virtual line (L 2 ) in a state of being seen from the front, and 
 a gap ( 54 ) to which the wire is fitted being formed between the outer engagement projection ( 44 ) and the inner engagement projection ( 47 ). 
 
   
   
     4. A spring manufacturing machine according to  claim 3 , wherein said final wire guide ( 13 ) is structured such as to be rotatable around the center line (C 1 ) of the wire passage, and the casing ( 17 ) of the wire feeding unit ( 16 ) is structured such as to be rotatable around the center line (C 1 ) of the wire passage. 
   
   
     5. A spring manufacturing machine according to  claim 3 , wherein said final wire guide ( 13 ) is structured such as to be rotatable around the center line (C 1 ) of the wire passage, and the casing ( 17 ) of the wire feeding unit ( 16 ) is structured such as to be rotatable around the center line (C 1 ) of the wire passage. 
   
   
     6. A spring manufacturing machine according to  claim 3 , wherein said final wire guide ( 13 ) is structured such as to be rotatable around the center line (C 1 ) of the wire passage, and the casing ( 17 ) of the wire feeding unit ( 16 ) is structured such as to be rotatable around the center line (C 1 ) of the wire passage.